I did do that before and it worked ok but left my hallway smelling like a grow op even with the carbon filter, at the moment i just point the exhaust upwards near my window and this seems to work pretty well for lowering temperatures but i am dreading the summer. This is another good reason to do a sealed grow, no worry about temps due to ambient temperatures outside - everything automated and fully controlled, sounds amazing actually. Apparently i don't even need to vent my hoods if i use a/c - its a lot of work and i have been advised that i don't need to do it in this climate but i think it makes sense - the only thing that is bothering me is where to exhaust the heat from the a/c. No helicopter is going to see a fully insulated grow but they will still see the heat from an exhaust